We are warned by our teachers not to waste time because time  21  will never return. I think it quite  22  . What does time look  23  ? Nobody knows, and we can¨t see it or touch it and no  24  of money can buy it. Time is abstract(渇�鶺�), so we have to 25  it.

  Time passes very quickly. Some students say they don¨t have  26  time to review their lessons. It is  27  they don¨t know how to make use of their time. They waste it in going to theatres or playing, and  28  other useless things. Why do we study every day? Why do we work? Why do most people  29   take buses instead of walking. The answer is very               30  .We wish to save time because time is  31  .

  Today we are living in the 21st century. We  32  time as life. When a person dies, his life ends. Since life is short, we must devote our time and energy to our  33   so that we    34  be able to work and live well in the future. Laziness is the  35   of time, for it not only brings us  36  , but also does other  37   to us. If it is necessary for us to do our work today,   38  us do it today and not  39  it until tomorrow. Remember that time is much more  40   .

21.  A. lost          B. passed           C. missed           D. used

22.  A. important      B. true          C. interesting        D. usual|

23.  A. for          B. like           C. after         D. over

24.  A. amount       B. quality            C. number       D. price

25.  A. think             B. imagine       C. guess            D. check

26.  A. spare            B. free         C. enough       D. much

27.  A. that          B. why          C. because      D. certain

28.  A. doing         B. making       C. taking            D. getting

29.  A. needn¨t       B. have to       C. had better     D. prefer

30.  A. easy         B. simple            C. stupid            D. interesting

31.  A. worthless     B. priceless      C. ready        D. little

32.  A. consider      B. agree            C. think         D. believe

33.  A. life           B. work         C. hobbies      D. study

34.  A. must          B. should           C. may         D. would

35.  A. helper           B. thief         C. friend            D. teacher

36.  A. wealth           B. health            C. failure            D. illness

37.  A. danger           B. harm         C. trouble           D. difficulty

38.  A. help         B. make         C. have         D. let

39.  A. keep         B. remain           C. manage      D. leave

40.  A. valuable        B. expensive     C. worth         D. rich.

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